CN116731480A - PBT alloy material with high glow wire ignition temperature and preparation method thereof - Google Patents
PBT alloy material with high glow wire ignition temperature and preparation method thereof Download PDFInfo
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- CN116731480A CN116731480A CN202310137317.9A CN202310137317A CN116731480A CN 116731480 A CN116731480 A CN 116731480A CN 202310137317 A CN202310137317 A CN 202310137317A CN 116731480 A CN116731480 A CN 116731480A
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- wire ignition
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- 239000000956 alloy Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 21
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims abstract description 21
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 17
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 239000004417 polycarbonate Substances 0.000 claims description 9
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 5
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 4
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 22
- 230000000704 physical effect Effects 0.000 abstract description 4
- 239000004033 plastic Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 16
- 239000002994 raw material Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 4
- 229920006778 PC/PBT Polymers 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- AGXUVMPSUKZYDT-UHFFFAOYSA-L barium(2+);octadecanoate Chemical group [Ba+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O AGXUVMPSUKZYDT-UHFFFAOYSA-L 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- -1 siloxane chain Chemical group 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010016654 Fibrosis Diseases 0.000 description 1
- JXLYSJRDGCGARV-WWYNWVTFSA-N Vinblastine Natural products O=C(O[C@H]1[C@](O)(C(=O)OC)[C@@H]2N(C)c3c(cc(c(OC)c3)[C@]3(C(=O)OC)c4[nH]c5c(c4CCN4C[C@](O)(CC)C[C@H](C3)C4)cccc5)[C@@]32[C@H]2[C@@]1(CC)C=CCN2CC3)C JXLYSJRDGCGARV-WWYNWVTFSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004761 fibrosis Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229960003048 vinblastine Drugs 0.000 description 1
- JXLYSJRDGCGARV-XQKSVPLYSA-N vincaleukoblastine Chemical compound C([C@@H](C[C@]1(C(=O)OC)C=2C(=CC3=C([C@]45[C@H]([C@@]([C@H](OC(C)=O)[C@]6(CC)C=CCN([C@H]56)CC4)(O)C(=O)OC)N3C)C=2)OC)C[C@@](C2)(O)CC)N2CCC2=C1NC1=CC=CC=C21 JXLYSJRDGCGARV-XQKSVPLYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a PBT alloy material with high glow wire ignition temperature and a preparation method thereof. The alloy material comprises PBT resin, PC-PDMS, fumed silica, PTFE and an auxiliary agent, wherein the mass ratio of the PBT resin to the PC-PDMS to the fumed silica to the PTFE is (70-85): 10-20): 5-10): 1-2. The preparation method comprises the following steps: premixing the components according to the weight ratio, and blending, melting, extruding and granulating the obtained mixture by a double-screw extruder to obtain the PBT alloy material with high glow wire ignition temperature. Compared with the prior art, the material disclosed by the invention has excellent physical properties and high glow wire ignition temperature, can be widely applied to plastic products in electrical contact with kitchen appliances, charging equipment and the like, and has wide application prospects.
Description
Technical Field
The invention relates to the field of PBT alloy, in particular to a PBT alloy material with high glow wire ignition temperature and a preparation method thereof.
Background
PC/PBT is a plastic alloy, which maintains the chemical resistance and the easy molding characteristics of the crystalline material PBT, and has the toughness and the dimensional stability of the amorphous material PC. The product is widely applied to automobile bumpers, automobile handles, electronic components and the like. PC/PBT has the combined properties of both PC and PBT, such as the high toughness and geometric stability of PC, and the chemical, thermal and lubricating properties of PBT.
The PBT alloy material has excellent electrical property, convenient injection molding and wide application. However, since materials are often used in electronic and electrical products, exposed high temperature parts such as wires are often encountered. If the glow wire ignition temperature is low, the ignition is easy to cause fire. Therefore, the glowing filament ignition temperature of the PBT alloy material is required to be high.
Disclosure of Invention
The invention aims to overcome at least one of the defects in the prior art and provide a PBT alloy material with a double-network structure and high glow wire ignition temperature, which can effectively improve the glow wire ignition temperature, and a preparation method thereof.
The aim of the invention can be achieved by the following technical scheme:
the PBT alloy material with the high glow wire ignition temperature comprises a PBT resin, PC-PDMS, fumed silica, PTFE and an auxiliary agent, wherein the mass ratio of the PBT resin to the PC-PDMS to the fumed silica to the PTFE is (70-85): 10-20): 5-10): 1-2.
Further, the mass ratio of the PBT resin to the PC-PDMS to the fumed silica to the PTFE is (75-80): (10-15): (5-10): (1-2).
Further, the alloy material comprises the following components in parts by weight:
the other auxiliary agents comprise an antioxidant, an ultraviolet absorber and a lubricant.
Further, the PBT resin has an intrinsic viscosity of 0.8 to 1.2dl/g. Further, the PC-PDMS is a polydimethylsiloxane-polycarbonate copolymer. Further, in PC-PDMS, the molar ratio of the PDMS chain segment to the PC chain segment is 1:9-2:8. Further, the fumed silica is synthetic fumed silica, the particle size range D50 is 3-10 mu m, and the porosity is more than 90%. Further, the compatibilizer is AS-GMA, wherein the content of the GMA is 1-10wt%, and the content of the GMA exceeds 10%, so that the material is crosslinked and cannot be extruded and granulated. Preferably, the GMA content is 1%;
further, the lubricant is barium stearate; the mass ratio of the antioxidant to the ultraviolet absorber to the lubricant is 1:1:1.
A method for preparing the PBT alloy material with the high glow wire ignition temperature, which comprises the following steps:
premixing the components according to the weight ratio, and blending, melting, extruding and granulating the obtained mixture by a double-screw extruder to obtain the PBT alloy material with high glow wire ignition temperature.
Further, the barrel temperature of the double-screw extruder is 240-290 ℃, the screw rotating speed is 200-600rpm, and the pressure is 1.5-2.5MPa.
Compared with the prior art, the invention develops the PBT alloy material with high glow wire ignition temperature. In the material, a siloxane chain segment in PC-PDMS is combined with fumed silica to form a siloxane bond network to be coated on the surface of a product. Meanwhile, the surface of the material is also coated by the fiber of PTFE to form a double-network structure. When the material is subjected to high temperature, the material double network contracts, the base material is prevented from burning, the glow wire ignition temperature can be effectively improved, and the temperature can be increased from 750 ℃ to 850 ℃. The material can be widely applied to products such as kitchen appliances, charging equipment and the like, and has great application prospect.
Detailed Description
The following describes in detail the examples of the present invention, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following examples.
The following examples and comparative examples were prepared from the following raw materials: PBT has an intrinsic viscosity of 1.0dl/g, a group of Taiwan vinblastine enterprises; LG8000 for PC-PDMS with LG chemistry, wherein the molar ratio of PDMS to PC segment is 1:9; fumed silica D50 is 4 μm, nano technology Co., ltd, and the porosity is more than 90%; PTFE is selected from A3800, mitsubishi chemical company of Japan; the compatilizer is SAG001, the content of GMA is 1wt%, and the compatilizer is produced by Shanghai day liter fine chemical industry Co., ltd; the other auxiliary agents comprise an antioxidant B900 (steam refining), an ultraviolet absorber Tinuvins UVP (Ciba) and a lubricant barium stearate, and the weight ratio of the auxiliary agents is 1:1:1.
The high glow wire ignition temperature PBT alloy materials prepared in examples 1-4 and comparative examples 1-3 were dried at 80 ℃ for 5 hours, and then subjected to injection molding test bars according to ASTM standards to detect physical properties; a160 mm by 100mm by 3mm plaque was injection molded according to IEC60695 standard and tested for glow wire ignition temperature.
TABLE 1
| Physical Properties | Test conditions | Test standard |
| Izod notched impact Strength (1/8) (J/m) | 23℃ | ASTM D256-10 |
| Glow wire ignition temperature | 160mm×100mm×3mm | IEC60695 |
Example 1
A PBT alloy material with high glow wire ignition temperature and a preparation method thereof specifically comprise the following steps:
(1) Weighing the components according to the weight ratio shown in the table 2;
(2) Preparing materials according to a formula, premixing all the components in a mixing barrel, and uniformly mixing for later use;
(3) And (3) blending, melting, extruding and granulating the mixture obtained in the step (2) through a double-screw extruder to obtain the product.
Feeding the mixed mixture from a main feed of a double-screw extruder, and performing melt extrusion, cooling, drying and granulating to obtain a sample; the double-screw extruder is a double-screw extruder rotating in the same direction, the length-diameter ratio of a screw is 40:1, and a vacuum pumping device and a temperature control device are arranged on the screw barrel; the temperature of the feeding section of the twin-screw extruder was 160 ℃, the temperature of the plasticizing section was 240 ℃, the temperature of the homogenizing section was 290 ℃, the screw rotation speed was 400rpm, and the pressure was 2.5MPa.
Example 2
PBT alloy material with high glow wire ignition temperature and preparation method thereof, wherein the weight ratio of raw materials is shown in Table 2, and the preparation method is the same as in example 1.
Example 3
PBT alloy material with high glow wire ignition temperature and preparation method thereof, wherein the weight ratio of raw materials is shown in Table 2, and the preparation method is the same as in example 1.
Example 4
PBT alloy material with high glow wire ignition temperature and preparation method thereof, wherein the weight ratio of raw materials is shown in Table 2, and the preparation method is the same as in example 1.
Comparative example 1
The weight ratio of the raw materials of the PBT alloy material is shown in Table 2, and the preparation method is the same as that of example 1.
Comparative example 2
The weight ratio of the raw materials of the PBT alloy material is shown in Table 2, and the preparation method is the same as that of example 1.
Comparative example 3
The weight ratio of the raw materials of the PBT alloy material is shown in Table 2, and the preparation method is the same as that of example 1.
TABLE 2
| The components | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| PBT resin | 75 | 80 | 80 | 85 | 75 | 80 | 75 |
| PC-PDMS | 15 | 15 | 10 | 10 | 0 | 15 | 15 |
| Fumed silica | 10 | 5 | 10 | 5 | 10 | 0 | 10 |
| PTFE | 1 | 1 | 2 | 2 | 2 | 2 | 0 |
| Compatibilizing agent | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Auxiliary agent | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
The physical properties and the light resistance test results of the PC resins of examples 1 to 4 and comparative examples 1 to 3 are shown in Table 3 below.
TABLE 3 Table 3
| Performance index | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Izod notched impact Strength (1/8) (J/m) | 124 | 116 | 109 | 127 | 77 | 157 | 125 |
| Glow wire ignition temperature (. Degree. C.) | 850 | 850 | 850 | 850 | 750 | 750 | 750 |
As shown by the test results of examples 1-4 and comparative examples 1-3 in Table 3, the siloxane chain segment in PC-PDMS is combined with fumed silica to form a siloxane bond network to cover the surface of the product. Meanwhile, the surface of the material is also coated by the fiber of PTFE to form a double-network structure. When the material receives high temperature, the material double network contracts, the base material is prevented from burning, the glow wire ignition temperature can be effectively improved, and the temperature can be increased from 750 ℃ to 850 ℃.
Comparative example 1 compared with example 1, the ignition temperature and impact strength of the glowing filament are reduced due to the lack of PC-PDMS, and the PDMS chain segment part in the PC-PDMS is a flexible chain, so that the toughening effect is achieved, and the impact strength of the product is improved. Meanwhile, because the PDMS chain segments are combined with the fumed silica in the material to form a siloxane bond network coating, the siloxane bond network coating and the network after PTFE fibrosis are coated simultaneously, a double-network structure is achieved, and the glow wire ignition temperature of the material can be effectively improved.
Comparative example 3 has a low glow wire ignition temperature due to the lack of PTFE and little change in impact strength compared to example 1, since the PDMS segment in the material still has a toughening effect and has little impact on impact. However, the lack of PTFE does not allow the material to be fibrillated to form a PTFE-coated network, and does not allow the material to have a double-network structure, and therefore the glow wire ignition temperature of the material cannot be increased.
In example 2, compared with comparative example 2, the use of fumed silica, although the impact strength is reduced, the glow wire ignition temperature is increased, because the added fumed silica forms a siloxane bond network, and the network after the PTFE is fibrillated is coated simultaneously, a double-network structure is achieved, and the glow wire ignition temperature of the material can be effectively increased.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The PBT alloy material with the high glow wire ignition temperature is characterized by comprising PBT resin, PC-PDMS, fumed silica, PTFE and an auxiliary agent, wherein the mass ratio of the PBT resin to the PC-PDMS to the fumed silica to the PTFE is (70-85): (10-20): (5-10): (1-2).
2. The PBT alloy material with the high glow wire ignition temperature according to claim 1, wherein the mass ratio of the PBT resin to the PC-PDMS to the fumed silica to the PTFE is (75-80): 10-15): 5-10): 1-2.
3. The PBT alloy material with high glow wire ignition temperature according to claim 1, wherein the alloy material comprises the following components in parts by weight:
the other auxiliary agents comprise an antioxidant, an ultraviolet absorber and a lubricant.
4. The high glow wire ignition temperature PBT alloy material according to claim 1, wherein the PBT resin has an intrinsic viscosity of 0.8 to 1.2dl/g.
5. The PBT alloy material with high glow wire ignition temperature according to claim 1, wherein the PC-PDMS is a polydimethylsiloxane-polycarbonate copolymer.
6. The high glow wire ignition temperature PBT alloy material according to claim 5, wherein the molar ratio of the PDMS segment to the PC segment in the PC-PDMS is 1:9-2:8.
7. The high glow wire ignition temperature PBT alloy material according to claim 1, wherein the fumed silica has a particle size D50 in the range of 3-10 μm and a porosity of >90%.
8. A PBT alloy material with high glow wire ignition temperature according to claim 3, wherein the compatibilizer is AS-GMA, and the GMA content is 1-10wt%.
9. A method for preparing the PBT alloy material with high glow wire ignition temperature according to claim 1, which comprises the following steps:
premixing the components according to the weight ratio, and blending, melting, extruding and granulating the obtained mixture by a double-screw extruder to obtain the PBT alloy material with high glow wire ignition temperature.
10. The method for preparing the PBT alloy material with the high glow wire ignition temperature according to claim 9, wherein the barrel temperature of the twin-screw extruder is 240-290 ℃, the screw rotation speed is 200-600rpm, and the pressure is 1.5-2.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310137317.9A CN116731480A (en) | 2023-02-20 | 2023-02-20 | PBT alloy material with high glow wire ignition temperature and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310137317.9A CN116731480A (en) | 2023-02-20 | 2023-02-20 | PBT alloy material with high glow wire ignition temperature and preparation method thereof |
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| Publication Number | Publication Date |
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| CN116731480A true CN116731480A (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310137317.9A Pending CN116731480A (en) | 2023-02-20 | 2023-02-20 | PBT alloy material with high glow wire ignition temperature and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116731480A (en) |
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- 2023-02-20 CN CN202310137317.9A patent/CN116731480A/en active Pending
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